Improvement in molds for making castings



artnr FFCFQ SAMUEL A. OORSER, OF NORTHAMPTON, ASSIGNOR TO HIMSELF, ROBT. G. MARSH, OF HOLYOKE, WVM. R. MARSH, OF NORTHAMPTON, AND JOHN A. SIMS, OF GREENFIELD, MASSACHUSETTS.

EMPROVEMENT IN MOLDS FOR MAKlNG CASTINGS.`

Speciication forming part of Letters Patent No. d'flll, dated April 5, 1864; antedated March 28, 1864.

T0 all whom t may concern:

Beit known that I, SAMUEL A. Consnn, a resident of Northampton, in the county of Hampshire and State of Massachusetts, have made a new and useful invention having reference to Molds for Making Castings; and I do hereby declare the same to be fully described in the following specification and represented in the accompanying drawings, of which- Figure l is a central and vertical section of my said invention. Fig. 2 is a top view thereof. Fig. 3 is a top view of the circular truckcarriage or base part of the mold. Figs. 4 and 5 are respectively top and bottom views of the male cam-plate, to be hereinafter described. Fig. 6 is a top view of the female cani-plate, and Fig. 7 a top view of the flask base-ring.

My invention consists incombining with a" mold provided with a mechanism for lowering the pattern with respect to the flask one or more sand grooves or recesses and discharging-outlets, arranged in the base of the mold, as hereinafter set forth.

It is a fact well known to founders, or those engaged in making heavy metallic castings, that great difliculty has been experienced in the methods heretofore adopted for disconnecting or freeing the pattern from the sand matrix after the latter may have been formed, such not only requiring a large amount of time, but often breaking or greatly injuring the surface of such matrix.

To find a simple means of obviating these difficulties, as well as others incident to the founding of metallic bodies, has been the object of my invention.

In the drawings, A denotes the base of the mold, which is of a circular form in horizontal section, and is supported by two axles, B B, each of which is furnished with two wheels, (l C, the object of such wheels being to enable the mold to be readily moved from one place to another.

D is a channel or groove formed concentrically around in the top surface of the base A, and near the outer edge thereof, the same being to receive any sand which may fall through the joints of the mold. a a a are a series of vertical ports for the discharge of any sand to allow the said female cam-plate to be roy tated horizontally. I

F is an arm or lever extending horizontally from the periphery of the plate E, and. into and through the base flask-ring I, and is for the purpose of causing rotary motion to be imparted to the said plate.

G is the male cam-plate, which is of the same diameter as its fellow plate E, and has a series of curved wedges, inclines, or cams, c c

c c, projectingdownward from its under sur-` face, the same being counterparts of the recesses I) b b b, before mentioned, and made to co-operate therewith for the purpose of causing the pattern H (arranged on the top of the male cam-plate) to be either elevated or depressed, as occasion may require. After the sand matrix may have been formed, by simply moving the arm F horizontally through an arc of thirty degrees, or thereabout, the gravitating power of the pattern will cause it to fall or be drawn away from such matrix. The said pattern (shown in the drawings) represents a half-sphere for forming the two halves of the matrix of a cannon-ball; but I do not intend to limit my invention to molds for the formation of bodies having spherical shapes, as it is well adapted to the production of articles having either plane or irregular surfaces.

I is an annulus, which encompasses the male and female cam-plates, and rests upon the base A of the mold. rI he said ring has a circular hole made vertically through it, of a diameter just sufiicient to allow the said male plate G to play vertically through it, as circumstances may require. The said ring I has a slot formed horizontally through one of its sides for the reception of the arm F, before mentioned, and, furthermore, on the inner vertical face of the said ring there are two vertical ways or guide-grooves which, respectively, receive an arm or stud projecting horizontally and at opposite sides from the upper camplate, Gr, the said arms and grooves being for the purpose of preventing rotation of such plate and allowing it to have only afree vertical movement.

K is the flask containing the pattern H, and has itsv lower surface resting on the ring I. This flask is of a cylindrical form, and has its outer curved surface coincident with those of the base A and the ring l.

Having described thc construction of my invention, its operation may be described as follows: If we suppose the several parts to be arranged as described, we first lay hold ofthe arm or lever F, and by moving the same from right to left the two inclines of the two camplates will be brought into action with each other, and will cause thc male cam-plate to be elevated to its highest. position, and as the base of the pattern rests on the said male plate such pattern will be brought into its proper position for forming the sand matrix. rPhe flask is next to be filled with sand, and the latter to be firmly compressed into the former and around the pattern by any vsuit able mechanism. (I prefer, however, the mechanism or means described in Letters Patent granted to me and an other on the 10th day of July, A. D. 1860.) After the sand matrix has been formed within the flask we next move the arm F from left to right, which causes the cams or projections of the male plate to descend into the inclined recesses of the female plate, and thereby allow the said pattern to fall away from the sand matrix, which it will do by its own gravitating power. After this the iiask is to be removed from its base-plate, inverted, and set aside to allow the matrix formed therein to become dry. N ext an empty flask is to be put, in the place of the former one, on the flask-ring, and the former operation repeated to form the other half of the matrix for thc fellow half of the cannon-ball or sphere.

By the construction of the base flask-ring in the manner described easy access can be had to the parts of the mold, should they get out of order. y

The mold as constructed with a mechan ism for lowering the pattern relatively to the i'lask, and as provided with one or more sandreeeiving groovesvor recesses and dischargingoutlets arranged in the base of the mold, substantially as specified.

y S. A. CORSER.

Witnesses:

Enos PARsoNs, i'. R. JoNEs. 

